---
product_id: 633730820
title: "KT3100BL"
brand: "ketotek"
price: "€ 42.32"
currency: EUR
in_stock: true
reviews_count: 8
category: "Ketotek"
url: https://www.desertcart.pt/products/633730820-kt3100bl
store_origin: PT
region: Portugal
---

# 3m high-precision NTC sensor 15A/120V high power output Wide temp range -40℉ to 248℉ KT3100BL

**Brand:** ketotek
**Price:** € 42.32
**Availability:** ✅ In Stock

## Summary

> 🌡️ Take control of your climate, effortlessly and precisely!

## Quick Answers

- **What is this?** KT3100BL by ketotek
- **How much does it cost?** € 42.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/633730820-kt3100bl)

## Best For

- ketotek enthusiasts

## Why This Product

- Trusted ketotek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Simplicity:** No wiring needed—just set your temps and let it auto-switch heating/cooling modes.
- • **Crystal-Clear LCD Backlight:** Wide-angle, customizable backlight for effortless monitoring anytime, anywhere.
- • **Universal Application Ready:** Perfect for greenhouses, incubators, homebrews, and more—Fahrenheit or Celsius.
- • **Versatile 5-Mode Timer Control:** From countdowns to cycling, tailor your temperature control with precision timing.
- • **Rock-Solid Safety & Reliability:** Fire-resistant ABS housing with saved settings even after power outages.

## Overview

The KETOTEK KT3100BL Digital Temperature Controller is a robust thermostat outlet plug featuring a wide temperature range (-40℉ to 248℉), a 3-meter high-precision NTC sensor, and a 15A/120V output. Its user-friendly LCD with customizable backlight ensures clear visibility, while 5 versatile modes offer tailored temperature and timer control. Designed with fire-resistant ABS material, it guarantees safe, reliable operation and retains settings through power outages. Ideal for professional and hobbyist applications including greenhouses, incubators, and fermentation setups.

## Description

Buy KETOTEK Digital Temperature Controller Thermostat Outlet Plug 120V with LCD Backlight, Heating Cooling Temperature Controlled Outlet 110V 15A with 3m Sensor: Incubator Accessories - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good - Took some time to learn how to use it but seems to be working
Review: Works for my use case. - Five stars because I've not encountered its reportedly shortcomings, as I'm only using a simple temperature on/off function (not timed). Another reviewer studied the unit ad nauseam, and provided revised instructions. I strongly recommend you find that review as a supplement. I can probably use an AI to merge the text, integrate his with the manufacturer's poor guidebook and output a 'new' instruction manual. 😆 I have its temperature probe affixed to the UV lamp on my RO system with thermal tape and Velcro, so that the lamp isn't running 24/7 when the water isn't moving, as that segment gets pretty hot. Some say the UV lamps will last longer if they're not cycled on and off. I suspect it might last longer if it's not getting so bloody hot when there's no water to cool it. In any case, what I spend on replacement lamps I might save in power reduction as an offset. 🤷‍♀️

## Features

- User-Friendly LCD Display for Clear Visibility – Wide-viewing-angle LCD with backlight ensures easy reading in low light or from any angle. Press any key to activate the backlight; press DOWN to turn off the backlight. Customize backlight duration: 10 min, 1 hr, 4 hrs, 8 hrs, or always on.
- Easy Setup, No Wiring Needed – Just plug in your device, set your desired start/stop temperatures, and let the KT3100BL thermostat outlet plug take over! It automatically switches between heating and cooling modes based on your settings. Wide temperature range: -40℉~248℉ (-40℃~120℃) for versatile heating or cooling applications.
- 5 Modes for Versatile Use - Switch 5 modes instantly with the MODE button: Temperature Control mode, F01 cycler timer mode, F02 Countdown ON mode, F03 Countdown OFF mode, F04 Countdown ON and Countdown OFF mode. Set range: 0~99 hours 59 minutes. Please note: Temperature Control Mode cannot run simultaneously with other modes.
- Safe and reliable design - Made in fire-resistant and durable materials for long-term stable operation, this thermostat plug outlet uses a 3-meter high-precision NTC 10K temperature sensor to monitor temperature in real-time, ensuring accurate and precise temperature control. Your settings are safely saved even during a power outage, no need to set again after power restoration.
- Wide application. This thermostat plug outlet works in both Fahrenheit and Celsius. It supports a temperature calibration function to ensure that the displayed temperature matches the actual temperature. This temperature controller is suitable for greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, fridge, homebrew, vivarium, fermentation, heat mat, and other temperature-controlled system. Output: Max 15A/120V.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D3X3JSKN |
| Best Sellers Rank | #31,279 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #28 in Temperature Controllers |
| Brand | KETOTEK |
| Brand Name | KETOTEK |
| Customer Reviews | 4.5 out of 5 stars 71 Reviews |
| Display Type | LCD |
| Included Components | 1*Thermostat Plug Outlet; 1*Manual |
| Manufacturer | KETOTEK |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Material Type | Acrylonitrile Butadiene Styrene (ABS) |
| Model | KT3100BL |
| Number of Items | 1 |
| Number of Packs | 1 |
| Operating Temperature | 248 °F |
| Part Number | KT3100BL US |
| Unit Count | 1 Count |

## Product Details

- **Brand:** KETOTEK
- **Display Type:** LCD
- **Material:** Acrylonitrile Butadiene Styrene (ABS)
- **Operating Temperature:** 248 °F
- **Unit Count:** 1 Count

## Images

![KT3100BL - Image 1](https://m.media-amazon.com/images/I/517Lt1GRJ5L.jpg)
![KT3100BL - Image 2](https://m.media-amazon.com/images/I/71ZuJEL-m1L.jpg)
![KT3100BL - Image 3](https://m.media-amazon.com/images/I/717Yk4dWWjL.jpg)
![KT3100BL - Image 4](https://m.media-amazon.com/images/I/71rcFeqEZmL.jpg)
![KT3100BL - Image 5](https://m.media-amazon.com/images/I/71BWuCW0XjL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by R***E on August 14, 2026*

Took some time to learn how to use it but seems to be working

### ⭐⭐⭐⭐⭐ Works for my use case.
*by T***© on May 30, 2026*

Five stars because I've not encountered its reportedly shortcomings, as I'm only using a simple temperature on/off function (not timed). Another reviewer studied the unit ad nauseam, and provided revised instructions. I strongly recommend you find that review as a supplement. I can probably use an AI to merge the text, integrate his with the manufacturer's poor guidebook and output a 'new' instruction manual. 😆 I have its temperature probe affixed to the UV lamp on my RO system with thermal tape and Velcro, so that the lamp isn't running 24/7 when the water isn't moving, as that segment gets pretty hot. Some say the UV lamps will last longer if they're not cycled on and off. I suspect it might last longer if it's not getting so bloody hot when there's no water to cool it. In any case, what I spend on replacement lamps I might save in power reduction as an offset. 🤷‍♀️

### ⭐⭐⭐⭐⭐ Great air temp probe
*by T***S on November 11, 2025*

Bought this to regulate the temperature of a towel warmer i made. It has been great. Easy to use, with a very long temperature probe wire. It is accurate in the high low temp setting and easy to change when necessary. Nice thing about the probe is it measure air temp, without having to actually attach to anything, (metal to metal).

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-14*